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2 years ago

Work the following time, distance, and rate problems. Answer should be to the nearest hundredth.

Mathematics

2 answers:

n200080 [17]2 years ago

8 0

The answer is 9.3, divide the distance between town A&B by the speed of the automobile. 420/45= 9.3 hours.

KATRIN_1 [288]2 years ago

6 0

Answer:

Step-by-step explanation:

Alright, lets get started.

The time, distance, speed formula is :

$time=\frac{distance}{speed}$

distance is given as 420 miles.

speed is given as 45 mph.

Plugging the value of distance and speed in above formula, we can find the time.

$time=\frac{420}{45}$

$time=9.33$

So, the time to travel between town A to town B will be 9.3 hours. : Answer

Hope it will help :)

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Insert 2 sets of parentheses to make each sentence true: 2 x 14 - 9 - 17 - 14 = 7

Mandarinka [93]

It’s most definitely C

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2 years ago

Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with mea

Anika [276]

Answer:

About 3 years Speedy Jet printers be guaranteed.

Step-by-step explanation:

Given : Quality control studies for Speedy Jet Computer Printers show the lifetime of the printer follows a normal distribution with

mean $\mu = 4$ and standard deviation $\sigma = 0.78$

If the company wishes to replace no more than 10% of the printers.

To find : How long should Speedy Jet printers be guaranteed ?

Solution :

Using Z- table,

Z value corresponding to 10% or 0.10 = -1.28.

Applying z-score formula,

$z=\frac{x-\mu}{\sigma}$

The value of x is given by,

$x=(z\times \sigma)+\mu$

Substitute the values,

$x=(-1.28\times 0.78)+4$

$x=-0.9984+4$

$x=3.0016$

So, approx 3 years.

Therefore, About 3 years Speedy Jet printers be guaranteed.

8 0

2 years ago

A school debate team has four girls and six boys. A total of four of the team members will be chosen to participate in the distr

alex41 [277]

Procedure:

1) calculate the number of diferent teams of four members that can be formed (with the ten persons)
2) calculate the number of teams tha meet the specification (two girls and two boys)
3) Divide the positive events by the total number of events: this is the result of 2) by the result in 1)

Solution

1) the number of teams of four members that can be formed are:

10*9*8*7 / (4*3*2*1) = 210

2) Number of different teams with 2 boys and 2 girls = ways of chosing 2 boys * ways of chosing 2 girls

Ways of chosing 2 boys = 6*5/2 = 15
Ways of chosing 2 girls = 4*3/2 = 6

Number of different teams with 2 boys and 2 girls = 15 * 6 = 90

3) probability of choosing one of the 90 teams formed by 2 boys and 2 girls:

90/210 = 3/7

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2 years ago

What is the positive difference between -8. and 9

Artemon [7]

Answer:

Step-by-step explanation:

9-8=1

Hope that this is helpful.

Have a nice day.

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2 years ago

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timama [110]

Answer:

Step-by-step explanation:

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2 years ago